/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 13:00:10,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 13:00:10,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 13:00:10,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 13:00:10,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 13:00:10,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 13:00:10,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 13:00:10,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 13:00:10,813 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 13:00:10,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 13:00:10,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 13:00:10,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 13:00:10,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 13:00:10,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 13:00:10,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 13:00:10,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 13:00:10,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 13:00:10,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:00:10,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 13:00:10,816 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 13:00:10,817 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 13:00:10,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 13:00:10,817 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 13:00:10,817 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 13:00:10,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 13:00:11,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 13:00:11,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 13:00:11,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 13:00:11,009 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 13:00:11,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2022-03-19 13:00:11,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65c699494/a612c6f21a964516b7ab8042a68bfbd8/FLAG0dd618885 [2022-03-19 13:00:11,453 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 13:00:11,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2022-03-19 13:00:11,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65c699494/a612c6f21a964516b7ab8042a68bfbd8/FLAG0dd618885 [2022-03-19 13:00:11,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65c699494/a612c6f21a964516b7ab8042a68bfbd8 [2022-03-19 13:00:11,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 13:00:11,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 13:00:11,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 13:00:11,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 13:00:11,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 13:00:11,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6325c6c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11, skipping insertion in model container [2022-03-19 13:00:11,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 13:00:11,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 13:00:11,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2022-03-19 13:00:11,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:00:11,668 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 13:00:11,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2022-03-19 13:00:11,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:00:11,689 INFO L208 MainTranslator]: Completed translation [2022-03-19 13:00:11,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11 WrapperNode [2022-03-19 13:00:11,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 13:00:11,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 13:00:11,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 13:00:11,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 13:00:11,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 13:00:11,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 13:00:11,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 13:00:11,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 13:00:11,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (1/1) ... [2022-03-19 13:00:11,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:00:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 13:00:11,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 13:00:11,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 13:00:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 13:00:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 13:00:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 13:00:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 13:00:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 13:00:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 13:00:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 13:00:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 13:00:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 13:00:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 13:00:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 13:00:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 13:00:11,829 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 13:00:11,830 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 13:00:11,904 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 13:00:11,909 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 13:00:11,909 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 13:00:11,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:00:11 BoogieIcfgContainer [2022-03-19 13:00:11,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 13:00:11,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 13:00:11,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 13:00:11,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 13:00:11,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:00:11" (1/3) ... [2022-03-19 13:00:11,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea56130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:00:11, skipping insertion in model container [2022-03-19 13:00:11,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:00:11" (2/3) ... [2022-03-19 13:00:11,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea56130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:00:11, skipping insertion in model container [2022-03-19 13:00:11,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:00:11" (3/3) ... [2022-03-19 13:00:11,916 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound2.c [2022-03-19 13:00:11,919 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 13:00:11,919 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 13:00:11,948 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 13:00:11,952 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 13:00:11,953 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 13:00:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 13:00:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 13:00:11,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:00:11,976 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:00:11,976 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:00:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:00:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2022-03-19 13:00:11,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:11,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [473843489] [2022-03-19 13:00:12,009 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:00:12,014 INFO L85 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 2 times [2022-03-19 13:00:12,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:00:12,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85453338] [2022-03-19 13:00:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:00:12,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:00:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:00:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:00:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:00:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:00:12,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:00:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85453338] [2022-03-19 13:00:12,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85453338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:12,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:12,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 13:00:12,182 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:00:12,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [473843489] [2022-03-19 13:00:12,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [473843489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:12,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:12,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 13:00:12,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392969818] [2022-03-19 13:00:12,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:00:12,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 13:00:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 13:00:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 13:00:12,209 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:00:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:00:12,282 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-03-19 13:00:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 13:00:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 13:00:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:00:12,290 INFO L225 Difference]: With dead ends: 47 [2022-03-19 13:00:12,290 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 13:00:12,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 13:00:12,296 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:00:12,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 13:00:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 13:00:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-19 13:00:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 13:00:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-03-19 13:00:12,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-03-19 13:00:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:00:12,333 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-03-19 13:00:12,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:00:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-03-19 13:00:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 13:00:12,335 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:00:12,335 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:00:12,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 13:00:12,335 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:00:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:00:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2022-03-19 13:00:12,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355216063] [2022-03-19 13:00:12,342 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:00:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 2 times [2022-03-19 13:00:12,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:00:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234436234] [2022-03-19 13:00:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:00:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:00:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:00:12,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:00:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:00:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:00:12,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:00:12,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234436234] [2022-03-19 13:00:12,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234436234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:12,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:12,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:00:12,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:00:12,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355216063] [2022-03-19 13:00:12,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355216063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:12,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:12,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:00:12,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674379325] [2022-03-19 13:00:12,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:00:12,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 13:00:12,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 13:00:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:00:12,458 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:00:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:00:12,540 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-03-19 13:00:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:00:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 13:00:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:00:12,542 INFO L225 Difference]: With dead ends: 32 [2022-03-19 13:00:12,542 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 13:00:12,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:00:12,543 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:00:12,543 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 13:00:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 13:00:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 13:00:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 13:00:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-03-19 13:00:12,549 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-03-19 13:00:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:00:12,549 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-03-19 13:00:12,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:00:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-03-19 13:00:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 13:00:12,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:00:12,550 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:00:12,550 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 13:00:12,550 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:00:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:00:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2022-03-19 13:00:12,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:12,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067492629] [2022-03-19 13:00:12,551 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:00:12,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 2 times [2022-03-19 13:00:12,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:00:12,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001645271] [2022-03-19 13:00:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:00:12,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:00:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:00:12,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:00:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:00:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:00:12,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:00:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001645271] [2022-03-19 13:00:12,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001645271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:12,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:12,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:00:12,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:00:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067492629] [2022-03-19 13:00:12,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067492629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:12,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:12,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:00:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761992193] [2022-03-19 13:00:12,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:00:12,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:00:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:00:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:00:12,643 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:00:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:00:12,863 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-19 13:00:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 13:00:12,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 13:00:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:00:12,866 INFO L225 Difference]: With dead ends: 36 [2022-03-19 13:00:12,866 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 13:00:12,868 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:00:12,870 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:00:12,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 13:00:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 13:00:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-19 13:00:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 13:00:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-19 13:00:12,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-19 13:00:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:00:12,890 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-19 13:00:12,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:00:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-19 13:00:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 13:00:12,890 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:00:12,891 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:00:12,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 13:00:12,891 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:00:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:00:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2022-03-19 13:00:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899624643] [2022-03-19 13:00:12,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:00:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 2 times [2022-03-19 13:00:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:00:12,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271511947] [2022-03-19 13:00:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:00:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:00:12,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 13:00:12,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477710195] [2022-03-19 13:00:12,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 13:00:12,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 13:00:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 13:00:12,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 13:00:12,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 13:00:12,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 13:00:12,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 13:00:12,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 13:00:12,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 13:00:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:00:13,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 13:00:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:00:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271511947] [2022-03-19 13:00:13,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 13:00:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477710195] [2022-03-19 13:00:13,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477710195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:13,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:13,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:00:13,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:00:13,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899624643] [2022-03-19 13:00:13,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899624643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:13,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:13,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:00:13,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486321865] [2022-03-19 13:00:13,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:00:13,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 13:00:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 13:00:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:00:13,073 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 13:00:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:00:13,113 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-19 13:00:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 13:00:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-19 13:00:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:00:13,115 INFO L225 Difference]: With dead ends: 40 [2022-03-19 13:00:13,116 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 13:00:13,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:00:13,118 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:00:13,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 13:00:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 13:00:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-19 13:00:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 13:00:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-19 13:00:13,138 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-03-19 13:00:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:00:13,138 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-19 13:00:13,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 13:00:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-19 13:00:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 13:00:13,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:00:13,139 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:00:13,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 13:00:13,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 13:00:13,354 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:00:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:00:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2022-03-19 13:00:13,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:13,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785756300] [2022-03-19 13:00:13,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:00:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 2 times [2022-03-19 13:00:13,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:00:13,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325486094] [2022-03-19 13:00:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:00:13,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:00:13,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 13:00:13,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7438820] [2022-03-19 13:00:13,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 13:00:13,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 13:00:13,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 13:00:13,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 13:00:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 13:00:13,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 13:00:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 13:00:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 13:00:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 13:00:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 13:00:13,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 13:00:13,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:00:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325486094] [2022-03-19 13:00:13,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 13:00:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7438820] [2022-03-19 13:00:13,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7438820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:13,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:13,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:00:13,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:00:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785756300] [2022-03-19 13:00:13,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785756300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:00:13,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:00:13,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:00:13,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016439439] [2022-03-19 13:00:13,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:00:13,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 13:00:13,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:13,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 13:00:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:00:13,519 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 13:00:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:00:13,548 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-19 13:00:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 13:00:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 13:00:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:00:13,551 INFO L225 Difference]: With dead ends: 44 [2022-03-19 13:00:13,551 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 13:00:13,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:00:13,553 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:00:13,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 13:00:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 13:00:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-19 13:00:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 13:00:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-19 13:00:13,563 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-03-19 13:00:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:00:13,564 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-19 13:00:13,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 13:00:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-19 13:00:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 13:00:13,565 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:00:13,565 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:00:13,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 13:00:13,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 13:00:13,775 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:00:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:00:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2022-03-19 13:00:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:00:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988456376]